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< 1 2 3 4 5 6 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 552 | Speed Dial | dp strings trees | Statement | F | Educational Codeforces Round 55 (Rated for Div. 2) {1082} | PROGRAMMING | 63544 | 2900 | |
| 2240 | The Fair Nut and Strings | greedy strings | Statement | B | Codeforces Round 526 (Div. 1) {1083} | PROGRAMMING | 63753 | 2100 | |
| 1129 | Vasya and Templates | greedy implementation strings | Statement | E | Technocup 2019 - Elimination Round 4 {1085} | PROGRAMMING | Technocup 2019 — Elimination Round 4 + Codeforces Round 528: editorial | 2500 | |
| 12720 | Right-Left Cipher | implementation strings | Statement | A | Technocup 2019 - Elimination Round 4 {1085} | PROGRAMMING | Technocup 2019 — Elimination Round 4 + Codeforces Round 528: editorial | 900 | |
| 147 | JS Minification | greedy implementation | Statement | J | 2018-2019 ICPC, NEERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1089} | PROGRAMMING | T | 3300 | |
| 604 | Two Prefixes | strings | Statement | J | 2018-2019 Russia Open High School Programming Contest (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1090} | PROGRAMMING | ru-olymp-team-russia-2018-presentation.pdf | 2700 | |
| 6371 | Prefixes and Suffixes | strings | Statement | C | Codeforces Round 527 (Div. 3) {1092} | PROGRAMMING | Codeforces Round #527 (Div. 3) Editorial | 1700 | |
| 17779 | Letters Rearranging | constructive algorithms greedy sortings strings | Statement | B | Educational Codeforces Round 56 (Rated for Div. 2) {1093} | PROGRAMMING | 63877 | 900 | |
| 36779 | Repeating Cipher | implementation | Statement | A | Codeforces Round 529 (Div. 3) {1095} | PROGRAMMING | Codeforces Round #529 (Div. 3) Editorial | 700 | |
| 11766 | Substring Removal | combinatorics math strings | Statement | B | Educational Codeforces Round 57 (Rated for Div. 2) {1096} | PROGRAMMING | Разбор Educational Codeforces Round 57 | 1400 | |
| 8798 | Yuhao and a Parenthesis | greedy implementation | Statement | C | Hello 2019 {1097} | PROGRAMMING | 64310 | 1400 | |
| 140 | Mateusz and an Infinite Sequence | bitmasks brute force dp strings | Statement | H | Hello 2019 {1097} | PROGRAMMING | 64310 | 3000 | |
| 44160 | Gennady and a Card Game | brute force implementation | Statement | A | Hello 2019 {1097} | PROGRAMMING | 64310 | 600 | |
| 283 | Ж-function | string suffix structures strings | Statement | F | Codeforces Round 530 (Div. 1) {1098} | PROGRAMMING | 64331 | 3500 | |
| 8584 | Balanced Ternary String | greedy strings | Statement | D | Codeforces Round 531 (Div. 3) {1102} | PROGRAMMING | 64439 | 1600 | |
| 10571 | Zuhair and Strings | brute force implementation strings | Statement | B | Codeforces Round 533 (Div. 2) {1105} | PROGRAMMING | Tutorial | 1200 | |
| 12802 | Digits Sequence Dividing | greedy strings | Statement | A | Educational Codeforces Round 59 (Rated for Div. 2) {1107} | PROGRAMMING | Educational Codeforces Round 59 Editorial | 1000 | |
| 4550 | Sasha and One More Name | constructive algorithms hashing strings | Statement | B | Codeforces Round 539 (Div. 1) {1109} | PROGRAMMING | Codeforces Round #539 Editorial | 1800 | |
| 439 | Modest Substrings | dp strings | Statement | H | Codeforces Global Round 1 {1110} | PROGRAMMING | The Editorial of the First Codeforces Global Round | 3500 | |
| 18171 | Superhero Transformation | implementation strings | Statement | A | CodeCraft-19 and Codeforces Round 537 (Div. 2) {1111} | PROGRAMMING | CodeCraft-19 and Codeforces Round #537 (Div. 2) Editorial | 1000 | |
| 677 | Crisp String | bitmasks dp | Statement | F | Educational Codeforces Round 60 (Rated for Div. 2) {1117} | PROGRAMMING | 65365 | 2600 | |
| 5179 | Frets On Fire | binary search sortings | Statement | D | Codeforces Global Round 2 {1119} | PROGRAMMING | Codeforces Global Round 2 Editorial | 1700 | |
| 2480 | Compress String | dp strings | Statement | C | Codeforces Round 543 (Div. 1, based on Technocup 2019 Final Round) {1120} | PROGRAMMING | Разбор задач финала Технокубка 2019 и Codeforces Round #543 | 2200 | |
| 1007 | Morse Code | binary search data structures dp hashing sortings string suffix structures strings | Statement | C | Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 1) {1129} | PROGRAMMING | 65520 | 2300 | |
| 1265 | String Multiplication | dp greedy strings | Statement | E | Codeforces Round 541 (Div. 2) {1131} | PROGRAMMING | Codeforces Round #541 Editorial | 2200 | |
| 10214 | Regular Bracket Sequence | greedy implementation | Statement | A | Educational Codeforces Round 61 (Rated for Div. 2) {1132} | PROGRAMMING | T | 1100 | |
| 7095 | Camp Schedule | greedy hashing strings | Statement | B | Codeforces Round 545 (Div. 1) {1137} | PROGRAMMING | Codeforces Round #545 – Editorial | 1700 | |
| 4207 | Circus | brute force greedy math strings | Statement | B | Codeforces Round 545 (Div. 2) {1138} | PROGRAMMING | Codeforces Round #545 – Editorial | 1700 | |
| 17684 | Even Substrings | implementation strings | Statement | A | Codeforces Round 548 (Div. 2) {1139} | PROGRAMMING | Codeforces Round #548 Editorial | 700 | |
| 11739 | Good String | implementation strings | Statement | B | Educational Codeforces Round 62 (Rated for Div. 2) {1140} | PROGRAMMING | Educational Codeforces Round 62 Editorial | 1200 | |
| 9008 | Colored Boots | greedy implementation | Statement | D | Codeforces Round 547 (Div. 3) {1141} | PROGRAMMING | 66062 | 1500 | |
| 620 | Foreigner | dp | Statement | D | Codeforces Round 549 (Div. 1) {1142} | PROGRAMMING | Codeforces Round #549 Editorial | 2700 | |
| 4448 | Median String | bitmasks math number theory strings | Statement | E | Codeforces Round 550 (Div. 3) {1144} | PROGRAMMING | 66307 | 1900 | |
| 22119 | Diverse Strings | implementation strings | Statement | A | Codeforces Round 550 (Div. 3) {1144} | PROGRAMMING | 66307 | 900 | |
| 9350 | Hate "A" | implementation strings | Statement | B | Forethought Future Cup - Elimination Round {1146} | PROGRAMMING | 66639 | 1100 | |
| 23735 | Love "A" | implementation strings | Statement | A | Forethought Future Cup - Elimination Round {1146} | PROGRAMMING | 66639 | 600 | |
| 3119 | Chladni Figure | brute force strings | Statement | B | Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} | PROGRAMMING | Forethought Future Cup Final Round Tutorial | 1900 | |
| 15575 | Another One Bites The Dust | greedy | Statement | A | Codeforces Global Round 3 {1148} | PROGRAMMING | Codeforces Global Round 3 Editorial | 700 | |
| 2053 | Three Religions | dp implementation strings | Statement | B | Codeforces Round 556 (Div. 1) {1149} | PROGRAMMING | 66783 | 2200 | |
| 11965 | Maxim and Biology | brute force strings | Statement | A | Codeforces Round 553 (Div. 2) {1151} | PROGRAMMING | Codeforces Round #553 (Div. 2) Editorial | 1000 | |
| 2584 | Neko and Aki's Prank | dp greedy trees | Statement | D | Codeforces Round 554 (Div. 2) {1152} | PROGRAMMING | T | 2000 | |
| 7810 | Serval and Parenthesis Sequence | greedy strings | Statement | C | Codeforces Round 551 (Div. 2) {1153} | PROGRAMMING | Editorial | 1600 | |
| 26934 | Reverse a Substring | implementation sortings strings | Statement | A | Educational Codeforces Round 63 (Rated for Div. 2) {1155} | PROGRAMMING | 66687 | 1000 | |
| 6597 | Ugly Pairs | dfs and similar greedy implementation sortings strings | Statement | B | Educational Codeforces Round 64 (Rated for Div. 2) {1156} | PROGRAMMING | 66827 | 1800 | |
| 2390 | The minimal unique substring | constructive algorithms math strings | Statement | B | Codeforces Round 559 (Div. 1) {1158} | PROGRAMMING | 66993 | 2200 | |
| 1571 | Mysterious Code | dp strings | Statement | D | Codeforces Round 558 (Div. 2) {1163} | PROGRAMMING | 66943 | 2200 | |
| 14460 | Good String | greedy | Statement | C | Codeforces Round 560 (Div. 3) {1165} | PROGRAMMING | Codeforces Round #560 (Div. 3) Editorial | 1300 | |
| 20353 | Telephone Number | brute force greedy strings | Statement | A | Educational Codeforces Round 65 (Rated for Div. 2) {1167} | PROGRAMMING | 67058 | 700 | |
| 441 | Anagram Paths | dp implementation trees | Statement | D | Codeforces Round 562 (Div. 1) {1168} | PROGRAMMING | Codeforces Round #562 — Editorial | 2900 | |
| 836 | Minus and Minus Give Plus | *special implementation strings | Statement | C | Kotlin Heroes: Episode 1 {1170} | PROGRAMMING | Kotlin Heroes Editorial | ||
| 22278 | WOW Factor | dp strings | Statement | B | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 1300 | |
| 4514 | Archaeology | brute force constructive algorithms greedy strings | Statement | E | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 1900 | |
| 6637 | Split a Number | greedy implementation strings | Statement | B | Codeforces Round 567 (Div. 2) {1181} | PROGRAMMING | Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) | 1500 | |
| 12037 | Plus from Picture | dfs and similar implementation strings | Statement | B | Codeforces Round 566 (Div. 2) {1182} | PROGRAMMING | 67614 | 1300 | |
| 4601 | Beautiful Lyrics | data structures greedy strings | Statement | C | Codeforces Round 566 (Div. 2) {1182} | PROGRAMMING | 67614 | 1700 | |
| 5456 | Subsequences (easy version) | dp graphs implementation shortest paths | Statement | E | Codeforces Round 570 (Div. 3) {1183} | PROGRAMMING | Tutorial | 2000 | |
| 3672 | Subsequences (hard version) | dp strings | Statement | H | Codeforces Round 570 (Div. 3) {1183} | PROGRAMMING | Tutorial | 2200 | |
| 156 | Heidi Learns Hashing (Hard) | fft math number theory | Statement | A3 | Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} | PROGRAMMING | helvetic-coding-contest-2019-editorial.pdf | 3100 | |
| 14264 | Email from Polycarp | implementation strings | Statement | B | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 1200 | |
| 6590 | Vus the Cossack and Strings | implementation math | Statement | C | Codeforces Round 571 (Div. 2) {1186} | PROGRAMMING | E | 1800 | |
| 12918 | Letters Shop | binary search implementation strings | Statement | B | Educational Codeforces Round 67 (Rated for Div. 2) {1187} | PROGRAMMING | Разбор Educational Codeforces Round 67 | 1300 | |
| 16142 | Keanu Reeves | strings | Statement | A | Codeforces Round 572 (Div. 2) {1189} | PROGRAMMING | Editorial of Codeforces Round #572 | 800 | |
| 9876 | Tokitsukaze and Mahjong | brute force implementation | Statement | B | Codeforces Round 573 (Div. 2) {1191} | PROGRAMMING | 68314 | 1200 | |
| 14636 | From S To T | implementation strings | Statement | C | Educational Codeforces Round 68 (Rated for Div. 2) {1194} | PROGRAMMING | Разбор Educational Codeforces Round 68 | 1300 | |
| 11170 | RGB Substring (easy version) | implementation | Statement | D1 | Codeforces Round 575 (Div. 3) {1196} | PROGRAMMING | Editorial | 1500 | |
| 10502 | RGB Substring (hard version) | data structures dp implementation two pointers | Statement | D2 | Codeforces Round 575 (Div. 3) {1196} | PROGRAMMING | Editorial | 1600 | |
| 9543 | Compress Words | brute force hashing implementation string suffix structures strings | Statement | E | Codeforces Round 578 (Div. 2) {1200} | PROGRAMMING | Codeforces Round #578 (Div. 2) Editorial | 2000 | |
| 17092 | Important Exam | implementation strings | Statement | A | Codeforces Round 577 (Div. 2) {1201} | PROGRAMMING | Codeforces Round #577 (Div 2) Editorial | 900 | |
| 10803 | You Are Given Two Binary Strings... | bitmasks greedy | Statement | A | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 1100 | |
| 5481 | Print a 1337-string... | combinatorics constructive algorithms math strings | Statement | D | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 1900 | |
| 2777 | You Are Given a WASD-string... | brute force data structures dp greedy implementation math strings | Statement | C | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 2100 | |
| 2814 | You Are Given Some Strings... | brute force string suffix structures strings | Statement | E | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 2500 | |
| 544 | You Are Given Some Letters... | binary search implementation math | Statement | F | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 2800 | |
| 9522 | Remove the Substring (easy version) | greedy implementation | Statement | D1 | Codeforces Round 579 (Div. 3) {1203} | PROGRAMMING | Codeforces Round #579 (Div. 3) Editorial | 1600 | |
| 8177 | Remove the Substring (hard version) | binary search greedy implementation two pointers | Statement | D2 | Codeforces Round 579 (Div. 3) {1203} | PROGRAMMING | Codeforces Round #579 (Div. 3) Editorial | 1800 | |
| 3226 | Kirk and a Binary String (easy version) | brute force greedy strings | Statement | D1 | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2000 | |
| 3402 | Kirk and a Binary String (hard version) | data structures greedy math strings | Statement | D2 | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2100 | |
| 376 | Expected Value Again | combinatorics strings | Statement | E | Codeforces Round 580 (Div. 1) {1205} | PROGRAMMING | 69158 | 3100 | |
| 1239 | Indie Album | data structures dfs and similar hashing string suffix structures strings trees | Statement | G | Educational Codeforces Round 71 (Rated for Div. 2) {1207} | PROGRAMMING | Educational Codeforces Round 71 Editorial | 2600 | |
| 1371 | Koala and Notebook | data structures dfs and similar graphs shortest paths strings trees | Statement | F | Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} | PROGRAMMING | 69791 | 2600 | |
| 149 | kotlinkotlinkotlinkotlin... | *special graphs implementation strings | Statement | F | Kotlin Heroes: Episode 2 {1211} | PROGRAMMING | Kotlin Heroes: Episode 2 Editorial | 2400 | |
| 5485 | Two Small Strings | brute force constructive algorithms | Statement | E | Codeforces Round 582 (Div. 3) {1213} | PROGRAMMING | Codeforces Round #582 (Div. 3) Editorial | 2000 | |
| 3037 | Unstable String Sort | data structures dfs and similar dsu graphs greedy implementation strings | Statement | F | Codeforces Round 582 (Div. 3) {1213} | PROGRAMMING | Codeforces Round #582 (Div. 3) Editorial | 2400 | |
| 7182 | Treasure Island | dfs and similar dp flows hashing | Statement | D | Codeforces Round 583 (Div. 1 + Div. 2, based on Olympiad of Metropolises) {1214} | PROGRAMMING | Tutorial | 1800 | |
| 11984 | Swap Letters | constructive algorithms greedy | Statement | C | Codeforces Round 585 (Div. 2) {1215} | PROGRAMMING | Codeforces Round #585 Editorial | 1500 | |
| 19590 | Prefixes | strings | Statement | A | Codeforces Round 587 (Div. 3) {1216} | PROGRAMMING | Codeforces Round #587 (Div. 3) Editorial | 900 | |
| 7878 | The Number Of Good Substrings | binary search bitmasks brute force | Statement | C | Educational Codeforces Round 72 (Rated for Div. 2) {1217} | PROGRAMMING | Educational Codeforces Round 72 Editorial | 1600 | |
| 760 | The Light Square | 2-sat dfs and similar greedy | Statement | I | Bubble Cup 12 - Finals [Online Mirror, unrated, Div. 1] {1218} | PROGRAMMING | E | 2200 | |
| 2484 | Periodic integer number | implementation strings | Statement | C | Bubble Cup 12 - Finals [Online Mirror, unrated, Div. 2] {1219} | PROGRAMMING | E | 1700 | |
| 10837 | Substring Game in the Lesson | games greedy strings | Statement | C | Codeforces Round 586 (Div. 1 + Div. 2) {1220} | PROGRAMMING | Codeforces Round #586 Editorial | 1300 | |
| 32929 | Cards | implementation sortings strings | Statement | A | Codeforces Round 586 (Div. 1 + Div. 2) {1220} | PROGRAMMING | Codeforces Round #586 Editorial | 600 | |
| 18224 | 2048 Game | brute force greedy math | Statement | A | Educational Codeforces Round 73 (Rated for Div. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 1000 | |
| 1174 | Game With String | games | Statement | E | Educational Codeforces Round 73 (Rated for Div. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 2400 | |
| 16100 | Strings Equalization | strings | Statement | B | Technocup 2020 - Elimination Round 1 {1223} | PROGRAMMING | Сodeforces Round 591 (and Technocup 2020 — Elimination Round 1) Editorial | 1000 | |
| 1193 | Not Same | constructive algorithms | Statement | G | Technocup 2020 - Elimination Round 3 {1227} | PROGRAMMING | Разбор задач №2 | 2500 | |
| 936 | Middle-Out | constructive algorithms greedy strings | Statement | E | Dasha Code Championship - Novosibirsk Finals Round (only for onsite-finalists) {1231} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 2000 | |
| 18917 | Distinct Characters Queries | data structures | Statement | D | Codeforces Round 590 (Div. 3) {1234} | PROGRAMMING | Codeforces Round #590 (Div. 3) Editorial | 1600 | |
| 2992 | Yet Another Substring Reverse | bitmasks dp | Statement | F | Codeforces Round 590 (Div. 3) {1234} | PROGRAMMING | Codeforces Round #590 (Div. 3) Editorial | 2400 | |
| 439 | Balanced Reversals | constructive algorithms | Statement | H | Codeforces Global Round 5 {1237} | PROGRAMMING | T | 3200 | |
| 6452 | AB-string | binary search combinatorics dp strings | Statement | D | Educational Codeforces Round 74 (Rated for Div. 2) {1238} | PROGRAMMING | Educational Codeforces Round 74 Editorial | 1800 | |
| 28335 | Prime Subtraction | math number theory | Statement | A | Educational Codeforces Round 74 (Rated for Div. 2) {1238} | PROGRAMMING | Educational Codeforces Round 74 Editorial | 900 | |
| 15383 | Character Swap (Easy Version) | strings | Statement | B1 | Codeforces Round 599 (Div. 2) {1243} | PROGRAMMING | Codeforces Round #599 Editorial | 1100 | |
| 7325 | Character Swap (Hard Version) | strings | Statement | B2 | Codeforces Round 599 (Div. 2) {1243} | PROGRAMMING | Codeforces Round #599 Editorial | 1600 | |
| 20072 | Constanze's Machine | dp | Statement | C | Codeforces Round 597 (Div. 2) {1245} | PROGRAMMING | Codeforces Round #597 (Div. 2) Editorial | 1400 | |
| 21648 | Broken Keyboard | brute force strings two pointers | Statement | A | Educational Codeforces Round 75 (Rated for Div. 2) {1251} | PROGRAMMING | 70860 | 1000 | |
| 11645 | Binary Palindromes | greedy strings | Statement | B | Educational Codeforces Round 75 (Rated for Div. 2) {1251} | PROGRAMMING | 70860 | 1400 | |
| 417 | Find String in a Grid | data structures dp strings trees | Statement | D | 2019-2020 ICPC, Asia Jakarta Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1252} | PROGRAMMING | T | 2900 | |
| 32558 | Payment Without Change | math | Statement | A | Codeforces Round 598 (Div. 3) {1256} | PROGRAMMING | Codeforces Round #598 (Div. 3) Editorial | 1000 | |
| 3630 | Equalizing Two Strings | constructive algorithms sortings strings | Statement | F | Codeforces Round 598 (Div. 3) {1256} | PROGRAMMING | Codeforces Round #598 (Div. 3) Editorial | 2200 | |
| 22609 | Magic Stick | math | Statement | B | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 1000 | |
| 17199 | Dominated Subarray | greedy implementation sortings strings two pointers | Statement | C | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 1200 | |
| 16773 | Obtain Two Zeroes | binary search math | Statement | B | Educational Codeforces Round 77 (Rated for Div. 2) {1260} | PROGRAMMING | Educational Codeforces Round 77 Editorial | 1200 | |
| 16249 | Secret Passwords | dfs and similar dsu graphs | Statement | D | Codeforces Round 603 (Div. 2) {1263} | PROGRAMMING | Codeforces Round #603 (Div. 2) Editorial | 1500 | |
| 15982 | Beautiful String | constructive algorithms greedy | Statement | A | Codeforces Round 604 (Div. 2) {1265} | PROGRAMMING | Codeforces Round #604 Editorial | 1000 | |
| 3371 | Lexicography | constructive algorithms strings | Statement | L | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 1800 | |
| 9086 | Long Beautiful Integer | constructive algorithms greedy implementation strings | Statement | A | Codeforces Round 609 (Div. 1) {1268} | PROGRAMMING | Codeforces Round #609 — Editorial | 1700 | |
| 1340 | Awesome Substrings | math strings | Statement | F | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 2600 | |
| 30996 | Yet Another Broken Keyboard | combinatorics dp implementation | Statement | C | Codeforces Round 605 (Div. 3) {1272} | PROGRAMMING | Codeforces Round #605 (Div. 3) Editorial | 1100 | |
| 2348 | Two Bracket Sequences | dp strings two pointers | Statement | F | Codeforces Round 605 (Div. 3) {1272} | PROGRAMMING | Codeforces Round #605 (Div. 3) Editorial | 2400 | |
| 449 | Asterisk Substrings | string suffix structures | Statement | F | Codeforces Round 606 (Div. 1, based on Technocup 2020 Elimination Round 4) {1276} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 3300 | |
| 18393 | Shuffle Hashing | brute force implementation strings | Statement | A | Educational Codeforces Round 78 (Rated for Div. 2) {1278} | PROGRAMMING | Educational Codeforces Round 78 Editorial | 1000 | |
| 231 | Kirchhoff's Current Loss | math | Statement | E | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 2900 | |
| 8705 | Azamon Web Services | greedy | Statement | B | Codeforces Round 607 (Div. 2) {1281} | PROGRAMMING | Codeforces Round #607 Editorial | 1500 | |
| 2386 | Enchanted Artifact | constructive algorithms interactive strings | Statement | D | Codeforces Round 610 (Div. 2) {1282} | PROGRAMMING | 72461 | 2300 | |
| 18605 | New Year and Naming | implementation strings | Statement | A | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 600 | |
| 8678 | Dr. Evil Underscores | bitmasks brute force dfs and similar divide and conquer dp greedy strings trees | Statement | D | Codeforces Round 613 (Div. 2) {1285} | PROGRAMMING | Codeforces Round #613 (Div. 2) Editorial | 1800 | |
| 1588 | Madhouse (Easy version) | brute force constructive algorithms interactive math | Statement | C1 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2400 | |
| 762 | Madhouse (Hard version) | brute force constructive algorithms hashing interactive math | Statement | C2 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2900 | |
| 674 | Fedya the Potter Strikes Back | data structures strings | Statement | E | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 3200 | |
| 7281 | Irreducible Anagrams | binary search constructive algorithms data structures strings two pointers | Statement | B | Codeforces Round 616 (Div. 1) {1290} | PROGRAMMING | 1000.0 | Codeforces Round #616 Editorial | 1900 |
| 20768 | Even But Not Even | greedy math strings | Statement | A | Codeforces Round 616 (Div. 2) {1291} | PROGRAMMING | 500.0 | Codeforces Round #616 Editorial | 1000 |
| 23003 | Collecting Packages | implementation sortings | Statement | B | Codeforces Round 615 (Div. 3) {1294} | PROGRAMMING | Codeforces Round #615 (Div. 3) Editorial | 1200 | |
| 13938 | Obtain The String | dp greedy strings | Statement | C | Educational Codeforces Round 81 (Rated for Div. 2) {1295} | PROGRAMMING | Educational Codeforces Round 81 Editorial | 1600 | |
| 9981 | Infinite Prefixes | math strings | Statement | B | Educational Codeforces Round 81 (Rated for Div. 2) {1295} | PROGRAMMING | Educational Codeforces Round 81 Editorial | 1700 | |
| 15770 | Yet Another Walking Robot | data structures implementation | Statement | C | Codeforces Round 617 (Div. 3) {1296} | PROGRAMMING | Codeforces Round #617 (Div. 3) Editorial | 1500 | |
| 53 | Paint the String | *special dp strings | Statement | H | Kotlin Heroes: Episode 3 {1297} | PROGRAMMING | Kotlin Heroes: Episode 3 Editorial | ||
| 9928 | Ayoub's function | binary search combinatorics greedy math strings | Statement | C | Codeforces Round 619 (Div. 2) {1301} | PROGRAMMING | 1250.0 | Codeforces Round #619 (Div. 2) Editorial | 1700 |
| 20149 | Three Strings | implementation strings | Statement | A | Codeforces Round 619 (Div. 2) {1301} | PROGRAMMING | 500.0 | Codeforces Round #619 (Div. 2) Editorial | 800 |
| 11 | Who needs suffix structures? | Statement | H | AIM Tech Poorly Prepared Contest (unrated, funny, Div. 1 preferred) {1302} | PROGRAMMING | 73599 | |||
| 8 | Deja vu | Statement | I | AIM Tech Poorly Prepared Contest (unrated, funny, Div. 1 preferred) {1302} | PROGRAMMING | 73599 | |||
| 3227 | Erase Subsequences | brute force dp greedy strings | Statement | E | Educational Codeforces Round 82 (Rated for Div. 2) {1303} | PROGRAMMING | Educational Codeforces Round 82 | 2200 | |
| 36995 | Erasing Zeroes | implementation strings | Statement | A | Educational Codeforces Round 82 (Rated for Div. 2) {1303} | PROGRAMMING | Educational Codeforces Round 82 | 700 | |
| 18802 | Longest Palindrome | brute force constructive algorithms greedy implementation strings | Statement | B | Codeforces Round 620 (Div. 2) {1304} | PROGRAMMING | 1000.0 | Codeforces Round #620 (Div. 2) Editorial | 1100 |
| 12523 | Kuroni and Simple Strings | constructive algorithms greedy strings two pointers | Statement | B | Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!) {1305} | PROGRAMMING | 1000.0 | Ozon Tech Challenge 2020 Editorial | 1300 |
| 12702 | Cow and Message | brute force dp math strings | Statement | C | Codeforces Round 621 (Div. 1 + Div. 2) {1307} | PROGRAMMING | 1500.0 | Codeforces Round #621 (Div. 1 + Div. 2) Editorial | 1500 |
| 731 | Au Pont Rouge | binary search dp strings | Statement | C | VK Cup 2019-2020 - Elimination Round (Engine) {1310} | PROGRAMMING | 1500.0 | VK Cup 2019-2020 - Elimination Round (Engine) and Codeforces Round #623 | 2800 |
| 1083 | Autocompletion | data structures dfs and similar dp | Statement | G | Educational Codeforces Round 83 (Rated for Div. 2) {1312} | PROGRAMMING | 74640 | ||
| 726 | Concatenation with intersection | data structures hashing strings two pointers | Statement | E | Codeforces Round 622 (Div. 2) {1313} | PROGRAMMING | 2500.0 | Editorial | 2800 |
| 9678 | Homecoming | binary search dp greedy strings | Statement | B | Codeforces Round 623 (Div. 2, based on VK Cup 2019-2020 - Elimination Round, Engine) {1315} | PROGRAMMING | 1000.0 | VK Cup 2019-2020 - Elimination Round (Engine) and Codeforces Round #623 | 1300 |
| 11788 | String Modification | brute force constructive algorithms implementation sortings strings | Statement | B | CodeCraft-20 (Div. 2) {1316} | PROGRAMMING | 1000.0 | Codecraft-20 (Div.2) Editorial | 1400 |
| 1719 | Reachable Strings | data structures hashing string suffix structures strings strings | Statement | D | Codeforces Round 625 (Div. 1, based on Technocup 2020 Final Round) {1320} | PROGRAMMING | 2000.0 | Codeforces Round #625 Editorial | |
| 30710 | Frog Jumps | binary search data structures greedy implementation | Statement | C | Codeforces Round 627 (Div. 3) {1324} | PROGRAMMING | Codeforces Round #627 (Div. 3) Editorial | ||
| 30915 | Yet Another Palindrome Problem | strings | Statement | B | Codeforces Round 627 (Div. 3) {1324} | PROGRAMMING | Codeforces Round #627 (Div. 3) Editorial | ||
| 13362 | Prefix-Suffix Palindrome (Easy version) | hashing string suffix structures strings | Statement | D1 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1500 |
| 11904 | Prefix-Suffix Palindrome (Hard version) | greedy hashing string suffix structures strings | Statement | D2 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1800 |
| 1010 | Wise Men (Easy Version) | bitmasks brute force dp meet-in-the-middle | Statement | F1 | Codeforces Global Round 7 {1326} | PROGRAMMING | 2000.0 | 74961 | 2600 |
| 687 | Wise Men (Hard Version) | bitmasks dp math | Statement | F2 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1500.0 | 74961 | 3200 |
| 534 | Letters and Question Marks | bitmasks dp string suffix structures | Statement | G | Educational Codeforces Round 84 (Rated for Div. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 2900 | |
| 32215 | K-th Beautiful String | combinatorics implementation math | Statement | B | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 1300 | |
| 538 | Dreamoon Likes Strings | constructive algorithms data structures | Statement | D | Codeforces Round 631 (Div. 1) - Thanks, Denis aramis Shitov! {1329} | PROGRAMMING | 2000.0 | Codeforces Round #631 Editorial | 3000 |
| 604 | Elementary! | brute force dp strings | Statement | F | April Fools Day Contest 2020 {1331} | PROGRAMMING | April Fools Day Contest 2020: editorial | ||
| 21300 | K-Complete Word | dfs and similar dsu greedy implementation strings | Statement | C | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 1250.0 | Codeforces Round #630 Editorial | 1500 |
| 425 | Substring Search | brute force fft | Statement | G | Educational Codeforces Round 85 (Rated for Div. 2) {1334} | PROGRAMMING | Educational Codeforces Round 85 Editorial | ||
| 42812 | Construct the String | constructive algorithms | Statement | B | Codeforces Round 634 (Div. 3) {1335} | PROGRAMMING | 75993 | 1000 | |
| 4113 | Kaavi and Magic Spell | dp strings | Statement | C | Codeforces Round 635 (Div. 1) {1336} | PROGRAMMING | 1500.0 | Codeforces Round #635 Editorial | 2200 |
| 24654 | Binary Period | constructive algorithms strings | Statement | B | Educational Codeforces Round 86 (Rated for Div. 2) {1342} | PROGRAMMING | 76633 | 1200 | |
| 15557 | Phoenix and Distribution | constructive algorithms greedy strings | Statement | C | Codeforces Round 638 (Div. 2) {1348} | PROGRAMMING | 1500.0 | Codeforces Round #638 (Div. 2) Editorial | 1600 |
| 19620 | Binary String Reconstruction | constructive algorithms dfs and similar math | Statement | F | Codeforces Round 640 (Div. 4) {1352} | PROGRAMMING | 77161 | 1500 | |
| 35523 | Ternary String | binary search dp implementation two pointers | Statement | B | Educational Codeforces Round 87 (Rated for Div. 2) {1354} | PROGRAMMING | 77593 | 1200 | |
| 13605 | Spy-string | bitmasks brute force constructive algorithms dp hashing strings | Statement | F | Codeforces Round 644 (Div. 3) {1360} | PROGRAMMING | Codeforces Round #644 (Div. 3) Editorial | 1700 | |
| 4870 | Binary Median | bitmasks brute force constructive algorithms | Statement | H | Codeforces Round 644 (Div. 3) {1360} | PROGRAMMING | Codeforces Round #644 (Div. 3) Editorial | 2100 | |
| 26313 | Subsequence Hate | implementation strings | Statement | B | Codeforces Round 646 (Div. 2) {1363} | PROGRAMMING | 1000.0 | 78202 | 1400 |
| 1747 | Rotating Substrings | dp strings | Statement | F | Codeforces Round 646 (Div. 2) {1363} | PROGRAMMING | 3000.0 | 78202 | 2600 |
| 621 | Construct the String | dp strings | Statement | G | Educational Codeforces Round 89 (Rated for Div. 2) {1366} | PROGRAMMING | Educational Codeforces Round 89 Editorial | ||
| 8881 | Task On The Board | constructive algorithms greedy implementation sortings | Statement | D | Codeforces Round 650 (Div. 3) {1367} | PROGRAMMING | Codeforces Round #650 (Div. 3) Editorial | ||
| 68262 | Short Substrings | implementation strings | Statement | A | Codeforces Round 650 (Div. 3) {1367} | PROGRAMMING | Codeforces Round #650 (Div. 3) Editorial | ||
| 21597 | Codeforces Subsequences | brute force constructive algorithms greedy math strings | Statement | B | Codeforces Global Round 8 {1368} | PROGRAMMING | 1000.0 | Codeforces Global Round 8: editorial | |
| 25637 | AccurateLee | greedy implementation strings | Statement | B | Codeforces Round 652 (Div. 2) {1369} | PROGRAMMING | 1000.0 | Codeforces Round #652 (Div. 2) Editorial | 1200 |
| 5234 | Binary Subsequence Rotation | binary search data structures dp greedy implementation | Statement | E | Codeforces Round 651 (Div. 2) {1370} | PROGRAMMING | 2500.0 | Editorial — Codeforces Round #651 | |
| 54156 | 01 Game | brute force constructive algorithms dp games implementation strings | Statement | B | Educational Codeforces Round 90 (Rated for Div. 2) {1373} | PROGRAMMING | Educational Codeforces Round 90 Editorial | ||
| 65318 | Move Brackets | greedy strings | Statement | C | Codeforces Round 653 (Div. 3) {1374} | PROGRAMMING | 79517 | ||
| 12336 | Acacius and String | brute force implementation strings | Statement | A | Codeforces Round 657 (Div. 2) {1379} | PROGRAMMING | 500.0 | Codeforces Round #657 Editorial | 1500 |
| 15308 | Universal Solution | greedy | Statement | B | Educational Codeforces Round 91 (Rated for Div. 2) {1380} | PROGRAMMING | Educational Codeforces Round 91 Editorial | ||
| 21790 | Prefix Flip (Easy Version) | constructive algorithms data structures strings | Statement | A1 | Codeforces Round 658 (Div. 1) {1381} | PROGRAMMING | 500.0 | Codeforces Round #658 Editorial | 1300 |
| 14413 | Prefix Flip (Hard Version) | constructive algorithms data structures strings two pointers | Statement | A2 | Codeforces Round 658 (Div. 1) {1381} | PROGRAMMING | 500.0 | Codeforces Round #658 Editorial | 1700 |
| 1059 | Strange Operation | data structures dp | Statement | E | Codeforces Round 659 (Div. 1) {1383} | PROGRAMMING | 2000.0 | Codeforces Round #659 Editorial | |
| 698 | String Transformation 2 | dp graphs trees | Statement | C | Codeforces Round 659 (Div. 1) {1383} | PROGRAMMING | 1750.0 | Codeforces Round #659 Editorial | |
| 11362 | String Transformation 1 | dsu graphs greedy sortings strings trees | Statement | A | Codeforces Round 659 (Div. 1) {1383} | PROGRAMMING | 1000.0 | Codeforces Round #659 Editorial | |
| 19799 | Common Prefixes | constructive algorithms greedy strings | Statement | A | Codeforces Round 659 (Div. 2) {1384} | PROGRAMMING | 500.0 | Codeforces Round #659 Editorial | |
| 20676 | Good String | brute force dp greedy implementation two pointers | Statement | C | Educational Codeforces Round 92 (Rated for Div. 2) {1389} | PROGRAMMING | 80809 | ||
| 9913 | Omkar and Bed Wars | constructive algorithms dp greedy math strings | Statement | D | Codeforces Global Round 10 {1392} | PROGRAMMING | 1500.0 | Codeforces Global Round 10 — Editorial | |
| 449 | Twilight and Ancient Scroll (easier version) | dp hashing implementation string suffix structures strings | Statement | E1 | Codeforces Round 662 (Div. 2) {1393} | PROGRAMMING | 1500.0 | Codeforces Round #662 Editorial | |
| 446 | Twilight and Ancient Scroll (harder version) | dp implementation string suffix structures strings | Statement | E2 | Codeforces Round 662 (Div. 2) {1393} | PROGRAMMING | 1500.0 | Codeforces Round #662 Editorial | |
| 1227 | Boboniu and String | binary search geometry ternary search | Statement | C | Codeforces Round 664 (Div. 1) {1394} | PROGRAMMING | 1500.0 | Codeforces Round #664 Editorial | 2600 |
| 29888 | Juggling Letters | greedy strings | Statement | A | Codeforces Round 666 (Div. 2) {1397} | PROGRAMMING | 500.0 | Codeforces Round #666 — Editorial | |
| 26026 | Substring Removal Game | games greedy sortings strings | Statement | B | Educational Codeforces Round 93 (Rated for Div. 2) {1398} | PROGRAMMING | Educational Codeforces Round 93 Editorial | ||
| 18557 | Binary String Reconstruction | 2-sat constructive algorithms greedy strings | Statement | C | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 1188 | x-prime Substrings | bitmasks dp greedy number theory string suffix structures strings | Statement | F | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 28005 | String Similarity | brute force constructive algorithms strings | Statement | A | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 19742 | Balanced Bitstring | implementation strings | Statement | A | Codeforces Round 668 (Div. 1) {1404} | PROGRAMMING | 500.0 | Codeforces Round #668 Editorial | |
| 5196 | Subsequences of Length Two | dp greedy | Statement | F | Codeforces Round 667 (Div. 3) {1409} | PROGRAMMING | Codeforces Round #667 (Div. 3) Editorial | ||
| 6277 | Perform Easily | data structures dp implementation sortings two pointers | Statement | C | Technocup 2021 - Elimination Round 1 {1413} | PROGRAMMING | 1500.0 | Codeforces Round 679 (Div. 1, Div. 2) and Technocup Round 1 editorial | |
| 5104 | XOR Inverse | bitmasks data structures divide and conquer greedy strings trees | Statement | C | Codeforces Round 673 (Div. 1) {1416} | PROGRAMMING | 1250.0 | Codeforces Round #673 Editorial | 2000 |
| 13581 | Palindromifier | constructive algorithms strings | Statement | C | Codeforces Round 676 (Div. 2) {1421} | PROGRAMMING | 1500.0 | Codeforces Round #676 (Div. 2) Editorial | |
| 857 | Minlexes | dp greedy implementation strings | Statement | E | Codeforces Round 675 (Div. 2) {1422} | PROGRAMMING | 2000.0 | Codeforces Round #675 (Div. 2) Editorial | |
| 617 | Ancient Language | graphs sortings | Statement | M | Bubble Cup 13 - Finals [Online Mirror, unrated, Div. 2] {1424} | PROGRAMMING | |||
| 4415 | Huge Boxes of Animal Toys | constructive algorithms | Statement | H | 2020 ICPC, COMPFEST 12, Indonesia Multi-Provincial Contest (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1425} | PROGRAMMING | Tutorial | 1300 | |
| 6212 | Number of Subsequences | combinatorics dp strings | Statement | F | Codeforces Round 674 (Div. 3) {1426} | PROGRAMMING | 83120 | 2000 | |
| 2619 | Fruit Sequences | binary search data structures divide and conquer dp | Statement | F | Codeforces Raif Round 1 (Div. 1 + Div. 2) {1428} | PROGRAMMING | 1750.0 | Codeforces Raif Round 1 Editorial | |
| 22761 | ABBB | greedy strings | Statement | C | Codeforces Raif Round 1 (Div. 1 + Div. 2) {1428} | PROGRAMMING | 1000.0 | Codeforces Raif Round 1 Editorial | |
| 7373 | String Reversal | data structures greedy strings | Statement | E | Educational Codeforces Round 96 (Rated for Div. 2) {1430} | PROGRAMMING | Educational Codeforces Round 96 — Editorial | ||
| 52 | Cyclic Shifts | *special strings | Statement | I | Kotlin Heroes 5: ICPC Round {1431} | PROGRAMMING | 84563 | ||
| 20978 | Reverse Binary Strings | constructive algorithms greedy | Statement | B | Educational Codeforces Round 97 (Rated for Div. 2) {1437} | PROGRAMMING | 84149 | ||
| 1285 | Death DBMS | data structures hashing string suffix structures strings trees | Statement | G | Educational Codeforces Round 97 (Rated for Div. 2) {1437} | PROGRAMMING | 84149 | ||
| 9172 | Catching Cheaters | dp strings | Statement | B | Codeforces Round 683 (Div. 1, by Meet IT) {1446} | PROGRAMMING | 1000.0 | E | |
| 18506 | Avoid Trygub | constructive algorithms sortings | Statement | A | Codeforces Global Round 12 {1450} | PROGRAMMING | 500.0 | Codeforces Global Round 12 Editorial | |
| 17350 | String Equality | dp greedy hashing implementation strings | Statement | C | Codeforces Round 685 (Div. 2) {1451} | PROGRAMMING | 1250.0 | Editorial — Codeforces Round #685 | |
| 20266 | Non-Substring Subsequence | greedy implementation strings | Statement | B | Codeforces Round 685 (Div. 2) {1451} | PROGRAMMING | 750.0 | Editorial — Codeforces Round #685 | |
| 21188 | Two Brackets | data structures greedy | Statement | C | Educational Codeforces Round 98 (Rated for Div. 2) {1452} | PROGRAMMING | 84847 | ||
| 1594 | Flip and Reverse | graphs greedy | Statement | D | Codeforces Round 691 (Div. 1) {1458} | PROGRAMMING | 2000.0 | Codeforces Round #691 Editorial (finished) | |
| 19010 | String Generation | constructive algorithms greedy | Statement | A | Codeforces Round 689 (Div. 2, based on Zed Code Competition) {1461} | PROGRAMMING | 500.0 | Codeforces Round #689 (Div. 2). Editorial | |
| 29282 | Last Year's Substring | implementation strings | Statement | B | Codeforces Round 690 (Div. 3) {1462} | PROGRAMMING | Codeforces Round #690 (Div. 3) Editorial | ||
| 1014 | Song of the Sirens | divide and conquer hashing math strings | Statement | G | Good Bye 2020 {1466} | PROGRAMMING | 2500.0 | Good Bye 2020 Editorial | |
| 18870 | Canine poetry | dp greedy strings | Statement | C | Good Bye 2020 {1466} | PROGRAMMING | 1000.0 | Good Bye 2020 Editorial | |
| 2205 | A Bit Similar | bitmasks brute force hashing string suffix structures strings two pointers | Statement | E | Educational Codeforces Round 101 (Rated for Div. 2) {1469} | PROGRAMMING | Educational Codeforces Round 101 Editorial | ||
| 3303 | New Year's Puzzle | brute force dp graph matchings greedy sortings | Statement | F | Codeforces Round 693 (Div. 3) {1472} | PROGRAMMING | Codeforces Round #693 (Div. 3) Editorial | ||
| 60434 | Fair Division | dp greedy | Statement | B | Codeforces Round 693 (Div. 3) {1472} | PROGRAMMING | Codeforces Round #693 (Div. 3) Editorial | ||
| 45792 | Cards for Friends | greedy math | Statement | A | Codeforces Round 693 (Div. 3) {1472} | PROGRAMMING | Codeforces Round #693 (Div. 3) Editorial | ||
| 35284 | String LCM | brute force math strings | Statement | B | Educational Codeforces Round 102 (Rated for Div. 2) {1473} | PROGRAMMING | Educational Codeforces Round 102 Editorial | ||
| 5944 | Unusual Matrix | 2-sat constructive algorithms greedy | Statement | F | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 88893 | Odd Divisor | bitmasks math number theory | Statement | A | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 57782 | New Year's Number | brute force dp math | Statement | B | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 2779 | Pattern Matching | bitmasks data structures dfs and similar graphs sortings strings | Statement | E | Educational Codeforces Round 103 (Rated for Div. 2) {1476} | PROGRAMMING | 87356 | ||
| 27211 | Yet Another String Game | games greedy strings | Statement | A | Codeforces Round 700 (Div. 2) {1480} | PROGRAMMING | 500.0 | Editorial of Codeforces Round #700 | |
| 12460 | Fence Painting | brute force constructive algorithms greedy implementation | Statement | C | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 1500.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 4887 | AB Graph | constructive algorithms graphs greedy implementation strings | Statement | D | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 2000.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 742 | AB Tree | dp greedy trees | Statement | F | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 3000.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 25779 | Space Navigation | greedy implementation strings | Statement | A | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 500.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 712 | String Counting | combinatorics dp math | Statement | G | Educational Codeforces Round 104 (Rated for Div. 2) {1487} | PROGRAMMING | 87873 | ||
| 71 | Build From Suffixes | *special combinatorics data structures | Statement | H | Kotlin Heroes: Episode 6 {1488} | PROGRAMMING | 88522 | ||
| 39146 | Sum of Cubes | binary search brute force brute force math | Statement | C | Codeforces Round 702 (Div. 3) {1490} | PROGRAMMING | Codeforces Round #702 (Div. 3) Editorial | ||
| 17591 | Maximum width | data structures dp greedy two pointers | Statement | C | Codeforces Round 704 (Div. 2) {1492} | PROGRAMMING | 1500.0 | Codeforces Round #704 Editorial | |
| 4968 | K-beautiful Strings | binary search brute force greedy implementation strings | Statement | C | Codeforces Round 705 (Div. 2) {1493} | PROGRAMMING | 1750.0 | Codeforces Round #705 (Div.2) Editorial | |
| 1093 | Enormous XOR | bitmasks greedy strings two pointers | Statement | E | Codeforces Round 705 (Div. 2) {1493} | PROGRAMMING | 2750.0 | Codeforces Round #705 (Div.2) Editorial | |
| 15369 | Berland Crossword | binary search bitmasks brute force greedy implementation | Statement | B | Educational Codeforces Round 105 (Rated for Div. 2) {1494} | PROGRAMMING | Educational Codeforces Round 105 Editorial | ||
| 22920 | ABC String | bitmasks brute force implementation | Statement | A | Educational Codeforces Round 105 (Rated for Div. 2) {1494} | PROGRAMMING | Educational Codeforces Round 105 Editorial | ||
| 22324 | Split it! | brute force constructive algorithms greedy strings | Statement | A | Codeforces Round 706 (Div. 2) {1496} | PROGRAMMING | 500.0 | Codeforces Round #706 Editorial | |
| 22059 | Binary Removals | brute force dp greedy implementation | Statement | B | Educational Codeforces Round 106 (Rated for Div. 2) {1499} | PROGRAMMING | Educational Codeforces Round 106 Editorial | ||
| 1670 | Chaotic Merge | combinatorics dp | Statement | E | Educational Codeforces Round 106 (Rated for Div. 2) {1499} | PROGRAMMING | Educational Codeforces Round 106 Editorial | ||
| 21993 | Domino on Windowsill | constructive algorithms math | Statement | A | Educational Codeforces Round 106 (Rated for Div. 2) {1499} | PROGRAMMING | Educational Codeforces Round 106 Editorial |